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Channel state information feedback triggering and feedback method and device

A technology for channel state information and measurement information, which is applied in the directions characterized by signaling, error prevention/detection using return channel, transmission modification based on link quality, etc. Difficulty in co-scheduling co-transmission and other problems

Active Publication Date: 2011-12-14
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Several feedback modes supported by aperiodic CSI feedback can only feed back channel information of a single transmission point, and the base station cannot obtain channel information of multiple transmission points, making it difficult Coordinated scheduling or coordinated transmission

Method used

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  • Channel state information feedback triggering and feedback method and device
  • Channel state information feedback triggering and feedback method and device
  • Channel state information feedback triggering and feedback method and device

Examples

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Effect test

example 1

[0041] Example 1, the extended aperiodic CSI feedback mode is extended mode 1-2; the feedback content corresponding to extended mode 1-2 includes:

[0042] For the measurement information of one or more first set transmission points in the aperiodic CSI measurement set, respectively feed back the channel quality indicator (CQI) information of one broadband under the current RI and the S subbands configured by the higher layer under the current RI. precoding matrix indication (PMI) information; and / or,

[0043] For one or more second set transmission point measurement information in the aperiodic CSI measurement set, respectively feed back the CQI information of a wideband under the set RI and the PMI information under the set RI.

[0044] Specifically, the PMI information under the set RI is: PMI information of one subband, or PMI information of multiple subbands, or one wideband PMI.

[0045] Preferably, in order to avoid feedback of redundant information, the measurement in...

example 2

[0046] Example 2, the extended aperiodic CSI feedback mode is extended mode 3-0; the feedback content corresponding to extended mode 3-0 includes:

[0047] For one or more first set transmission point measurement information in the aperiodic CSI measurement set, respectively feed back the CQI information of a wideband under the current RI and the PMI information of a subband configured by a higher layer under the current RI; and / or,

[0048] For one or more second set transmission point measurement information in the aperiodic CSI measurement set, respectively feed back the CQI information of a wideband under the set RI and / or the CQI information of a high-level configured subband under the set RI .

[0049] Preferably, in order to avoid feedback of redundant information, the measurement information of the second set transmission point is not included in the measurement information of the first set transmission point, or the measurement information of the second set transmis...

example 3

[0050] Example 3, the extended aperiodic CSI feedback mode is extended mode 3-1; the feedback content corresponding to extended mode 3-1 includes:

[0051] For the measurement information of one or more first set transmission points in the aperiodic CSI measurement set, respectively feed back the CQI information of a broadband under the current RI, and the PMI and CQI information of the subbands configured by the upper layer under the current RI; and / or,

[0052] For one or more second set transmission point measurement information in the aperiodic CSI measurement set, feed back the CQI information of one broadband under the set RI, the PMI information of one broadband under the set RI, and the PMI information of one wide band under the set RI. At least one of the PMI of the subband configured by the higher layer and the CQI information of the subband configured by the higher layer under the RI are set.

[0053] Preferably, in order to avoid feedback of redundant information...

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Abstract

The present invention relates to the technical field of wireless communications. Disclosed in an embodiment of the present invention are a channel state information (CSI) feedback trigger, feedback method and device for enabling a terminal to conduct non-periodic CSI feedback in an expanded non-periodic CSI feedback mode supporting COMP transmission. In the present invention, a base station determines the expanded non-periodic CSI feedback mode adopted by the terminal to conduct the non-periodic CSI feedback, and notifies the terminal the determined feedback mode via signaling; the base station triggers the terminal via signaling to conduct the non-periodic CSI feedback in the expanded non-periodic CSI feedback mode; and the terminal conducts the non-periodic CSI feedback in the expanded non-periodic CSI feedback mode. The present invention enables the terminal to conduct the non-periodic CSI feedback in the expanded non-periodic CSI feedback mode.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a channel state information feedback triggering and feedback method and device. Background technique [0002] The coordinated multipoint transmission (Coordinated Multipoint Transmission / Reception, CoMP) technology refers to the cooperation between multiple geographically separated transmission points. Generally, the multiple transmission points are base stations of different cells, or multiple RRHs controlled by the base station of the same cell. Through cooperative transmission among multiple transmission points, interference between different transmission points can be effectively reduced, and throughput of users, especially cell edge users, can be improved. Downlink multi-point coordinated transmission technical solutions are mainly divided into two categories: cooperative scheduling / beamforming (CS / CB) and joint processing (Joint processing). [0003] Coordinated sche...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04L1/16
CPCH04L1/06H04L1/0027H04L1/16
Inventor 陈文洪高秋彬张然然李辉
Owner DATANG MOBILE COMM EQUIP CO LTD
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